---
id: CVE-2026-103552
title: >-
  Stack Overflow vulnerability in Apache Directory LDAP API.




  Before binding, a client can send a deeply nested search filter that overflows
  the stack in the server's decoder.




  This issue affects Apache Directory LDAP API: from 1.2.0 b…
summary: >-
  Stack Overflow vulnerability in Apache Directory LDAP API.




  Before binding, a client can send a deeply nested search filter that overflows
  the stack in the server's decoder.




  This issue affects Apache Directory LDAP API: from 1.2.0 b…
severity: none
cwe:
  - CWE-121
vendor: Apache Software Foundation
product: 'org.apache.directory.api:api-ldap-codec-core'
affected:
  - 'org.apache.directory.api:api-ldap-codec-core >= 1.2.0 < 1.2.9'
published: '2026-10-02'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T10:17:06.303'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-103552'
references:
  - url: 'https://lists.apache.org/thread.html/fn3bwknn57266hx66w9vv6b4k8rfwcx7'
    label: security@apache.org
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-02T10:15:55.896Z'
---

## Overview

Stack Overflow vulnerability in Apache Directory LDAP API.



Before binding, a client can send a deeply nested search filter that overflows the stack in the server's decoder.



This issue affects Apache Directory LDAP API: from 1.2.0 before 1.2.9.



Users are recommended to upgrade to version 1.2.9, which fixes the issue.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.